A new hydraulic engine mount design without the peak frequency

R. Tikani, N. Vahdati, S. Ziaei-Rad, M. Esfahanian

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Hydraulic engine mounts are generally applied to the aerospace and automotive applications for the purpose of cabin noise and vibration reduction. By careful selection of mount design parameters, at a certain frequency called the notch frequency, the dynamic stiffness will be smaller than the static stiffness. Following the notch frequency there will be a frequency, called the peak frequency, where the dynamic stiffness is much higher than the static stiffness. Increase in the dynamic stiffness above the static stiffness is not desirable because of the increase in transmitted force to the airframe or the chassis. Here in this paper, a new hydraulic engine mount design is proposed that uses two working fluids. This new design has two notch frequencies and two peak frequencies. Under special conditions, the peak frequency can be eliminated. As a result, one can obtain a hydraulic engine mount design with only one notch frequency but no peak frequency, by using a controllable fluid or a high viscosity fluid as one of the working fluids. The new hydraulic engine mount design, its mathematical model, and some discussions on the simulation results are presented.

Original languageBritish English
Pages (from-to)1644-1656
Number of pages13
JournalJVC/Journal of Vibration and Control
Issue number11
StatePublished - Oct 2011


  • Double-notch frequency
  • hydraulic engine mounts
  • no peak frequency
  • passive fluid mounts


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